|
|
A232653
|
|
Number of (n+2)X(7+2) 0..1 arrays x(i,j) with every row sum{j*x(i,j), j=1..7+2} equal, and every column sum{i*x(i,j), i=1..n+2} equal, with upper left element zero
|
|
0
|
|
|
|
OFFSET
|
1,3
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..0..1..0..1..0..0..1..1..1....0..0..1..1..0..0..0..1..0
..1..1..1..1..1..1..0..0..1....0..1..0..0..0..1..1..0..0
..1..0..1..0..1..1..1..1..0....1..0..0..0..1..0..0..0..1
..1..0..1..0..1..1..1..1..0....1..0..0..0..1..0..0..0..1
..1..1..1..1..1..1..0..0..1....0..1..0..0..0..1..1..0..0
..0..1..0..1..0..0..1..1..1....0..0..1..1..0..0..0..1..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|